The invention discloses a car seat pedal turnover mechanism capable of regulating in multiple stages and automatically returning. The car seat pedal turnover mechanism capable of regulating in multiple stages and automatically returning consists of a pedal returning mechanism and a multi-stage regulating and locking mechanism, wherein the pedal returning mechanism consists of a first return spring, a first pedal shaft, a first damping gear and a second damping gear; the multi-stage regulating and locking mechanism consists of a second pedal shaft, a locking wheel, a bracket, a left set bar, a left return spring, a left hinge pin, a right set bar, a right return spring, a right hinge pin, a driving block, a driving lever, a second return spring, a hinge pin and a pulling lever; when the foot of a passenger applies downward load to a pedal, the pedal rotates around the pedal shaft; the wedge-shaped locking groove of the locking wheel is meshed with the left set bar and the right set bar, and the pedal is locked; when the passenger does not use the pedal, the driving lever can be pressed to unlock the locking mechanism; meanwhile, an automatic returning mechanism begins to work; and the pedal automatically returns to the original nonuse position.